"It is because the contemporary alternatives seem so one-sided and are not more evidently solutions to the problems which Thomas faced, and partly solved, that we return to him and to the tradition of theology and philosophy in which his Summa Theologiae appears: theology as the science of the first principle and this as the total knowledge of reality in its unity." -- Wayne J. Hankey, God in Himself (Oxford University Press, 1987), p.159.

Hope differs specifically from desire or cupidity because hope differs from desire, as the irascible passions differ from the concupiscible. For this reason, moreover, hope presupposes desire: just as all irascible passions presuppose the passions of the concupiscible faculty, as stated above (q25 a1).

The species of a passion is taken from the object. Now, in the object of hope, we may note four conditions. First, that it is something good; since, properly speaking, hope regards only the good; in this respect, hope differs from fear, which regards evil.

Thirdly, that it must be something arduous and difficult to obtain, for we do not speak of any one hoping for trifles, which are in one's power to have at any time: in this respect, hope differs from desire or cupidity, which regards the future good absolutely: wherefore it belongs to the concupiscible, while hope belongs to the irascible faculty.